Tag: measurement of properties

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Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

To convert Kelvin scale to Celsius scale:

  1. add $273$ to Kelvin scale
  2. subtract $273$ from Kelvin scale
  3. multiply $273$ with Kelvin scale
  4. divide $273$ by Kelvin scale
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
$^0C=K-273$
To convert Kelvin to Celsius, subtract $273$ from kelvin scale.

Hence, option $B$ is the answer.
Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

Which is correct option about the prefix centi is:

  1. One thousand

  2. One thousandth

  3. One hundred

  4. One hundredth

  5. One million
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Selected Prefixes and Their Meanin

 G  billions (U.S.)  giga
 M  Million mega 
 k  thousand  kilo
 h*  hundred  hecto*
 da*  ten  deka*
 d*  tenth  deci*
 c*  hundredth  centi*
 m*  thousandth  milli
 $\mu$  millionth  micro
 n  billionth (U.S.)  nano
Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

Which temperature is hottest?

  1. $17^oC$
  2. $58^o F$
  3. $290 K$
  4. $16^o C$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Relation between celsius kelvin and fahrenheit scale.
${ T } _{ C }=\frac { 5 }{ 9 } ({ T } _{ F }-32){ =T } _{ K }-273.15$

$17^0C=17^0C$
$58^0F=\frac {58-32} {1.8}=14.44^0C$
$290K={290-273.15}^0C=16.85^0C$

$16^0C=16^0C$

$17^0C$ is hotter.
Option A is correct.

Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

Which of the following is not a conversion factor?

  1. 12 eggs = 1 dozen

  2. 30 lbs.

  3. 60 miles per hour

  4. 1 km/1,000 m

  5. 4 apples per week
Reveal answer Fill a bubble to check yourself
C,D,E Correct answer
Explanation

Conversion factor involves same units. For example, length can be converted to length only, time to time only, etc.